MCQ ON PLACENTA class 12 for NEET | PLACENTA class 12 | MCQ PLACENTA with Answer | Check the below NCERT MCQ question for class 12 Biology based on the with Answers.
MCQ on PLACENTA class 12 Biology with answers were prepared based on the latest pattern.We have provided class 12 Biology MCQs questions on PLACENTA with Answers to help students understand the concept very well.
MCQ ON PLACENTA is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23, 2023-24
Introduction:-
Placenta is structure produced by fusion of uterine endometrium with extra embryonic foetal membranes like chorion , for physiological exchange between foetus and mother’s blood. It has two parts maternal and foetal. Classified variously
According to nature of foetal membranes involved, placenta is of three types:-
a.chorio – vitelline placenta – it is formed from yolk sac and chorion e.g.kangaroo.
b.Chorio- allantoic placenta- it is derived from both allantois and chorion e.g. marsupial
c.chorionic placenta- it consists of chorion alone e.g. humans
Nature of maternal and foetal tissues –
a.epithelio – chorial placenta
b. Syndesmo – chorial placenta
c.endothelio – chorial placenta
d.Haemo- chorial placenta
e.haemoendothelial placenta
Nature of uterine wall at birth
a.nondeciduate placenta
b.deciduate placenta
c.contra – deciduate placenta
Nature of arrangement of Villi
a.diffuse placenta
b.cotyledonary placenta
c.intermediate placenta
d.zonary placenta
e.discoidal placenta
f.metadiscoidal placenta
MCQ ON PLACENTA class 12 for NEET
1. Placenta formed from yolk sac and chorion
(a) chorio – vitelline placenta
(b) chorio- vitelline placenta
(c) chorio- allantoic placenta
(d) all the above
Ans (a) chorio- vitelline placenta
2. Marsupial bandicoot and all eutherian except humans have
(a) chorio – vitelline placenta
(b) chorio- allantoic placenta
(c) chorionic placenta
(d) cross pollination
Ans. (b) chorio- allantoic placenta
3. Humans have
(a) chorionic placenta
(b) haemo- chorial placenta
(c) endothelial – chorial placenta
(d) all the above
Ans. (a) chorionic placenta
4. In rat , rabbit and pig contains
(a) haemo-endothelial placenta
(b) haemo- chorial placenta
(c) chorionic placenta
(d) zonary placenta
Ans.(a) haemo-endothelial placenta
5. Many mammals contains
(a) nondeciduate placenta
(b) deciduate placenta
(c) diffuse placenta
(d) centro – deciduate placenta
Ans.(b) deciduate placenta
6. The villi are distributed uniformly along the entire surface of chorio-allantois placenta
(a) cotyledonary placenta
(b) diffuse placenta
(c) intermediate placenta
(d) zonary placenta
Ans.(b) diffuse placenta
7. Tiger ,lion ,cat ,dog ,elephant
have
(a) diffuse placenta
(b) zonary placenta
(c) intermediate placenta
(d) discoidal placenta
Ans.(b) zonary placenta
8. Intermediate placenta is found in
(a) camel
(b) giraffe
(c) both a and b
(d) tiger
Ans.(c) both a and b
9. Cotyledonary placenta occurs in
(a) cow
(b) buffalo
(c) sheep and goat
(d) all the above
Ans. (d) all the above
10. Type of placenta is formed in humans by
(a) amnion
(b) allantois
(c) chorion
(d) all the above
Ans. (c) chorion
11. Membrane that gives protection to embryo from external shocks is
(a) amnion
(b) allantois
(c) chorion
(d) placenta
Ans.(c) chorion
12. Foetus is attached to uterine wall by
(a) placenta
(b) chorionic
(c) teratogenic
(d) mesoderm
Ans . (a) placenta
13. Placenta is connected to foetus by a rope like structure
(a) umbilical cord
(b) amniotic sac
(c) amniotic fluid
(d) corpus luteum
Ans.(a) umbilical cord
14. Umbilical cord is mainly formed of
(a) amnion
(b) allantois
(c) chorion
(d) all the above
Ans. (b) allantois
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15. hCG hormone is secreted by
(a) placenta
(b) uterus
(c) ovum
(d) ovary
Ans.(a) placenta
16. Which acts as barrier as well as ultrafilter between foetus and mother is
(a) uterus
(b) fallopian tube
(c) ovary
(d) placenta
Ans.(d) placenta
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